AirHint found the following cheapest return flights from Washington (DCA) to St. Thomas (STT) in December 2025 (see full year).

Return flights

05 Dec - 09 Dec	jetBlue
06 Dec - 11 Dec	jetBlue
23 Dec - 26 Dec	United
05 Dec - 11 Dec	jetBlue
06 Dec - 10 Dec	jetBlue
05 Dec - 10 Dec	jetBlue
25 Dec - 29 Dec	United
12 Dec - 17 Dec	Delta
24 Dec - 28 Dec	United
12 Dec - 15 Dec	Delta
30 Dec - 02 Jan	United
31 Dec - 04 Jan	Delta

Also check the deals for one-way flights from Washington to St. Thomas in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to St. Thomas in December from 295€

Return flights